SQLite列表視圖返回空行數據

Question

我有一個列表視圖，並用arrayadpter創建它，但是當我嘗試添加數據時，它顯示空行爲每次我試圖清空數據，我檢查數據庫和信息進入只是從不在行上顯示。下面的代碼：

public class Column_Adapter extends ArrayAdapter<Income>{ 


    public LayoutInflater inflater; 
    public ArrayList<Income> incomes; 
    public int viewResource; 

    public Column_Adapter(Context context, int textViewResourceId, ArrayList<Income> incomes){ 
     super(context, textViewResourceId, incomes); 
     this.incomes = incomes; 
     inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     viewResource = textViewResourceId; 
    } 

    public View getView(int position, View convertView, ViewGroup parent){ 
     convertView = inflater.inflate(viewResource, null); 

     Income income = incomes.get(position); 



     if(income !=null) { 
      TextView infoView = (TextView) convertView.findViewById(R.id.expense_type); 
      TextView amountView = (TextView) convertView.findViewById(R.id.expense_amount); 
      TextView budgetView = (TextView) convertView.findViewById(R.id.expense_budget); 
      if (infoView != null) { 
       infoView.setText(income.getiDate()); 
      }if(amountView != null){ 
       amountView.setText(income.getiAmount()); 
      }if(budgetView != null){ 
       budgetView.setText(income.getiMethod()); 
      } 
     } 

     return convertView; 
    } 
} 

佈局模板：

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <TextView 
     android:id="@+id/expense_budget" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="@string/eExpInc" 
     android:layout_marginLeft="32dp" 
     android:layout_marginStart="32dp" 
     android:layout_alignBaseline="@+id/expense_amount" 
     android:layout_alignBottom="@+id/expense_amount" 
     android:textAppearance="@style/TextAppearance.AppCompat.Large" 
     android:textSize="18sp" 
     android:textStyle="bold" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true" /> 

    <TextView 
     android:id="@+id/expense_type" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="@string/eDefaultType" 
     android:layout_marginRight="52dp" 
     android:layout_marginEnd="52dp" 
     android:layout_alignBaseline="@+id/expense_amount" 
     android:layout_alignBottom="@+id/expense_amount" 
     android:layout_alignParentRight="true" 
     android:layout_alignParentEnd="true" 
     android:textAppearance="@style/TextAppearance.AppCompat.Large" 
     android:textSize="18sp" 
     android:textStyle="bold" /> 

    <TextView 
     android:id="@+id/expense_amount" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="51dp" 
     android:text="@string/eDefaultAmount" 
     android:layout_alignParentTop="true" 
     android:layout_centerHorizontal="true" 
     android:textAppearance="@style/TextAppearance.AppCompat.Large" 
     android:textSize="18sp" 
     android:textStyle="bold" /> 



</RelativeLayout> 

Answer 1

正如似乎忘了這

public int getCount() { 
    if(incomes!=null) 
    return incomes.size(); 
    return 0; 
} 

Answer 2

下面的鏈接是有代碼，這將有助於你

http://www.mediafire.com/file/wy6pv7664jp5m8m/CustomListviewAdapterExam.7z

這將有setter和getter類，在listadapter類和一個活動